Process of extracting oil



-( No Model.) '2 Sheets-Sheet 1.

W. T. FORBES. PROCESS OF EXTRAOTING OIL.

N0. 427,410. Patented May 6, 189OQ '(IIIIYIIIIIIIIIIIIIIIIIIAI tIIIIII/IIIIIIII I/II/lF! W/T/VVE88E8: INVENTOR ATTORNEY.

TH: Nonms PEYERS co, wow-Luna, WASHINGTON, n. c.

2 Sheets-Sheet 2.

(No Model.)

W. T. FORBES. PROCESS OF BXTRAGTING OIL.

Patentd May 6, 1890.

us t.

IIVVEIVTOR' WITNESSES:

ATTORNEY.

NirEn Y STATES VALTER T. FORBES, OF ATLANTA, GEORGIA.

PROCESS OF EXTRACTING OIL.

SPECIFICATION forming part of Letters Patent No. 427,410, dated May 6, 1890.

Application filed December 16, 1889. Serial No. 333,968. (No model.) I

To all whom it may concern:

Be it known that l, \VALTER T. FORBES, of Atlanta, in the county of Fulton and State of Georgia, have invented certain new and usef ul Improvements in the Process of Extracting Oil; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled trif u gal.

in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to the extracting of oil from cotton or other seed by means of a solventpreferably n aphthaand has for its object more perfect diffusion of the solvent than has heretofore been obtained and its subsequent separation from the oil.

The invention consists of the several operations hereinafter described,which operations are carried on by apparatus substantially such as is shown in the accompanying drawings and described herein.

Figure 1 is a sectional view of a centrifugal suitably arranged to perform all the necessary functions of this process. Fig. 2 shows the retorting-cylinders piped and connected suitably to perform the functions required.

The kernel or oil-bearing part of the seeds, commonly called the meats, after having the outer shell or hulls removed or being crushed whole, are placed in the cylinder of a cen- The preferred form of centrifugal is that shown on Fig. 1, features that are peculiar and essential to the operations of this process being, first, the pipe A, which extends downwardly into the cylinder-'13 to a point near its bottom,and which has connection with the naphtha and steam pipes O D through the valve E, by which valve it may be opened into either pipe, or separate valves may be used; second, the pipe connecting the interior of the casing of the centrifugal with condensing apparatus of any approved form. The pipe in the centrifugal is perforated, the perforations being small and of a total area somewhat less than the area of the pipe. The i'laphtha-pipc 0 should be connected to an elevated tank or naphtha and regulate the quantity discharged through the perforations, a sufficient quantity of meats for charge being placed in the cylinder and the casing being tightly closed to prevent the escape of the vapor or naphtha. The naphtha should be admitted through the perforated pipe A, the valve F being closed, and the naphtha should. be allowed to run until it shall have filled the casing to the height of the meats in the cylinder. When the material is fully charged with the solvent, preferably naphtha, as just described, the perforated cylinder should be revolved at such a velocity as will cause the discharge of the solution. The inflow of naphtha maybe continued during this revolution, if desired.

The process above described for distributing the naphtha through the mass is more effective than any heretofore employed, as the motion of the centrifugal cylinder will prevent the formation of channels by the naphtha and cause perfect diffusion.

The operation is to draw the solution from the casing G and throw by centrifugal force the liquid from the cylinder, allowing, if nec essary, the naphtha to flow through the perforations to the end of the operation, when it should be out off. The steam is then admitted through the valve E, the quantity and pressure being sufficient to heat the contents of the cylinder to approximately 160 to drive off in a vapor the, naphtha remaining in the charge, the vapor being conducted in a pipe H to a condenser. The water of condensation should then be thrown out of the cylinder by centrifugal force and be drawn off through a cock for that purpose.

If from the nature of the material it is necessary to dry thematerial from which the oil has been extracted, it may be done by means suitable for the purpose and in a manner as to not injure the efficient or desirable properties of said material. The oil and naphtha after being drawn from the tank should enter the evaporating-tanks and in charges that will fill the tank I to the overflow-pipe and to a somewhat less height in the tank J, as shown in Fig. 2. The pump K connects the tanks, and is so arranged as to draw the oil from the tank J and force it into the tank I. These tanks are steam-heated, preferably by a steam-coil in the tank I and a steam-jacket around the tank J, which will give a preponderance of heatin the tank I and the greatest available space for oil in the tank J.

The function of this apparatus is to drive off the naphtha from the oil in a vapor, and the operation is as follows: The solution of oil in naphtha being charged into the tanks I to the height above described, the pump is started and steam is turned on in the pipes of the coil in the tank I and in the jacket of the tank J, which steam may be exhaust from the engine of the pump or live steam, as preferable, the result of the heat from the steam being the vaporizing of the naphtha in the oil, the vapor being carried off to condensing apparatus by the pipes L, and by the arrangement of the tank and the pipe and the pump the oil is caused to circulate from the bottom of the tank J, at which place the temperature will remain the lowest, to the bottom of the tank I, in which the heating-surface is greater in proportion to the volume of oil it contains than in the tank. The oil and naphtha will rise and become hotter in doing so, giving off naphtha-vapor from the surface very rapidly, and after becoming partially exhausted of its naphtha it will be discharged by the pipe M into the tank J, which will promote by agitation a still further vaporization of the naphtha. The circulation going on, as above described, will expose the hottest part of the oil and naphtha at the surface of the tanks, first in the tank I in a comparatively quiet condition, and, second, in the tank J in an agitated condition, which, it is believed, will expose all the naphtha in its hottest condition at the surface and permit its escape in the form of vapor.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows:

The process, substantially as described, of treating oleaginous material, consisting of treating said material with a solvent, then expelling the dissolved oil and solvent from the mass by centrifugal force, then introducing steam to vaporize any of the solvent remaining in the residuum, then drying the same by applying centrifugal force, as described, all of the different steps of the process being applied while the material operated upon is contained in the revolving chamber of a centrifugal machine, substantially as set forth.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

\VALTER T. FORBES.

IVitnesses:

A. P. W001), S. M. 0019. 

